diff -u b/core/core.services.yml b/core/core.services.yml
--- b/core/core.services.yml
+++ b/core/core.services.yml
@@ -508,6 +508,7 @@
     parent: default_plugin_manager
   plugin.cache_clearer:
     class: Drupal\Core\Plugin\CachedDiscoveryClearer
+    lazy: true
   paramconverter.menu_link:
     class: Drupal\Core\ParamConverter\MenuLinkPluginConverter
     tags: